Numerical Evaluation of Ventilation Efficiency in Underground Metro Rail Transport Systems

Teodosiu, Cătălin; Ilie, Viorel; Dumitru, Radu; Teodosiu, Raluca

doi:10.1016/j.egypro.2015.12.241

Cited by 4 publications

(1 citation statement)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Underground railway stations are studied in the literature due to the complex flow structures and need for efficient ventilation systems, for example, in case of fire (e.g. Rie et al 2006, Teodosiu et al 2016. Finally two studies can be found in the literature, where the sheltering efficiencies of shelters at small (tram and bus) stations were investigated.…”

Section: Introductionmentioning

confidence: 99%

Wind sheltering effect of a small railway station shelter and its impact on wind comfort for passengers

Allegrini

Kubilay

2017

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

Shelters, instead of buildings, are used at small railway stations in Switzerland to protect waiting passengers from environmental loading such as wind, rain and sun. As they are mostly located on open terrain, small railway stations are exposed to wind and therefore require wind comfort analysis. Generally, the same shelter design is used for a large number of different railways stations at locations with different local climates. These shelters have to be designed carefully to protect the passengers for a large number of weather conditions with, for example, different wind speeds and wind directions. In this paper, a wind comfort study for a prototype of a railway station shelter is presented. Computational fluid dynamics (CFD) simulations are conducted to predict the local wind velocities in and around the shelter. The results based on amplification factors show a good wind sheltering efficiency of the prototype for most common weather conditions in Switzerland. Because the side and back walls of the shelter do not reach the ground, high wind velocities can be obtained at the level of the feet and legs. Simulations with modified side and back wall geometries show that the wind sheltering efficiency can be improved by introducing small modifications.

show abstract

Section: Introductionmentioning

confidence: 99%

Wind sheltering effect of a small railway station shelter and its impact on wind comfort for passengers

Allegrini

Kubilay

2017

Journal of Wind Engineering and Industrial Aerodynamics

View full text Add to dashboard Cite

show abstract

Influences of the optimized air curtain at subway entrance to reduce the ingress of outdoor airborne particles

Chen

Cao

Wang

et al. 2021

Energy and Buildings

View full text Add to dashboard Cite

Review of numerical studies on ventilation systems for subway networks in emergency situations

Kubinyecz

Teodosiu

2021

IOP Conf. Ser.: Earth Environ. Sci.

View full text Add to dashboard Cite

Since the subway systems are constantly developing at a high rate to cope with the increasing number of commuters, their safety is a great challenge and extensive research was done to fulfil the safety regulations in this field. Numerical modelling represents a modern research method used more frequently in the academic environment over the last decades, being constantly validated through comparisons with results of other classical research methods. This paper presents a thorough analysis of the numerical studies on smoke evacuation in emergency situations from tunnels and subway stations, with a focus on the research concerning the use of platform screen doors (PSD) in emergency situations generated by fires. The numerical simulation software mostly used are Fire Dynamics Simulation and Ansys Fluent (based on Computational Fluid Dynamics modelling technique), their results being extensively compared with experiments and analytical formulae. Since most of the studies focus on determining the specific values of some fire related parameters (critical velocity of the ventilated air, backlayering distance of the smoke, maximum temperature in the smoke layer or maximum concentration of smoke pollutants), a lack of research regarding the efficient use of PSDs concomitant with the ventilation system in emergency mode has been identified.

show abstract

Numerical Evaluation of Ventilation Efficiency in Underground Metro Rail Transport Systems

Cited by 4 publications

References 8 publications

Wind sheltering effect of a small railway station shelter and its impact on wind comfort for passengers

Wind sheltering effect of a small railway station shelter and its impact on wind comfort for passengers

Influences of the optimized air curtain at subway entrance to reduce the ingress of outdoor airborne particles

Review of numerical studies on ventilation systems for subway networks in emergency situations

Contact Info

Product

Resources

About